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feature of Rome

Indeed, ancient city walls still enclose much of the city centre, which is the area of Rome to which tourists flock. The so-called
Servian Wall, named for the 6th-century-
bce Roman king Servius Tullius but built almost certainly 12 years after the Gauls’ destruction of Rome in 390
bce, enclosed most of the Esquiline and Caelian hills and all of the other five. It was built into ramparts...